Negativity – being negative in an interview creates a bad image. People want to hire people who are enthusiastic and positive about their job, not people who complain about their boss or previous job.
Talk about your social/personal life – Unless it is absolutely necessary or relevant to talk about your personal life avoid it. It may give the impression you do not take your professional life seriously.
Blame others for your failures – if you continuously blame someone or something for failures in your career you it can give the impression you do not take responsibility. Ultimately you are in control of your career, no one else.
Control the conversation – when you are talking you are not listening. You are in an interview to be interviewed. Listen, take your time to answer correctly and let the interviewer guide the meeting.
Vague answers – if you can’t recall your daily tasks from your job this sends alarm bells to the potential employer. They ask themselves “how well does this person really know their role if they can’t explain what they are doing?”. If you get nervous and go blank during a meeting, pause explain to the interviewer you are nervous and take your time to go through your job step by step. If you really do know your job it should not be too difficult.
Arrogance - you may be highly gifted at what you do but the interviewer does not work with you or have first-hand experience of your expertise. So take the time to explain what you do and how you have achieved your goals.
Sloppy body language – the way you present yourself doesn’t just apply to the way you dress and your personal grooming, it also includes your behaviour and body language. Try not to slouch over the table or sit back too far in your chair. Sit up straight, with your hands in your lap and give the interviewer your full attention.